Thank you for getting in touch with us about your concern, accounts-saltoro.
I'll share some info about the feature and how you can do this in QuickBooks Online.
A bill of materials is a list of all the components you use to build a product. While we're unable to directly set this up in the online version, you can create items and add them as a bundle.
Here's how:
Go to Sales > Products and Services.
Click the New button and select Inventory, Non-inventory, or Service.
Furthermore, you can search for a third-party application that has the bill of materials feature. To see the lists of apps, you can follow these steps:
On the left navigation menu, click Apps.
Type a keyword in the search field and press enter.
Select the app to see the key benefits.
Click on the Get app now button if you want to integrate the application.
Kindly inform me if you have any additional questions about the steps above. I'd love to help you out some more. Stay safe.